Novel heat-treated cobalt phthalocyanine/carbon-tungsten oxide nanowires (CoPc/C-W18O49) cathode catalyst for direct methanol fuel cell

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Abstract

Platinum group metal (PGM) is the common catalyst used in cathode side of Direct Methanol Fuel Cell (DMFC), however, problem arise because of the competitive reaction between methanol oxidation and oxygen reduction. Besides, using a PGM catalyst makes the DMFC expensive. Many non-platinum catalysts were developed but most of them produce hydrogen peroxide that is toxic to the cathode and membrane that reduces the performances of the fuel cell. Thus, this study proposes a novel non-platinum catalyst that produced water as main product instead of hydrogen peroxide. CoPc/C-W18O49 is prepared via pyrolysis and they demonstrate as a promising catalyst to replace PGM in acidic media. As a semiconductor metal oxide, W18O49 has interesting properties and is used as a catalyst support to enhance the reactivity of the oxygen reduction reaction. W18O49 were synthesized first through a solvo-thermal process and then mixed with CoPc/C via pyrolysis at 700 °C, and they were also synthesized in the reverse order. The catalyst was physically characterized by Field Emission Scanning Electron Microscopy (FESEM), Transmission Electron Microscopy (TEM) and X-ray Diffraction (XRD) and chemically characterized by Cyclic Voltammetry (CV) and Rotating Ring-Disc Electrode (RRDE) analysis for the oxygen reduction reaction (ORR). The results showed that the supported Nanowires (W18O49) are not transformed to WO3 after the pyrolysis process. The prepared catalyst, which is inert in the methanol environment electrolyte, has shown catalytic activity towards oxygen reduction in acidic media and has a 3.81-electron transfer, which produces water as the main product. The catalyst has comparable performance with other macrocycle catalysts with modified structures.

Original languageEnglish
Pages (from-to)19-29
Number of pages11
JournalJournal of Electroanalytical Chemistry
Volume803
DOIs
Publication statusPublished - 15 Oct 2017

Fingerprint

Direct methanol fuel cells (DMFC)
Nanowires
Tungsten
Cobalt
Cathodes
Carbon
Catalysts
Oxides
Platinum
Metals
Oxygen
Pyrolysis
Hydrogen peroxide
Hydrogen Peroxide
Methanol
Hot Temperature
cobalt phthalocyanine
tungsten oxide
Poisons
Catalyst supports

Keywords

  • Cobalt phthalocyanine-carbon/tungsten oxide
  • Direct methanol fuel cell
  • Nanowires
  • Non-platinum catalyst

ASJC Scopus subject areas

  • Analytical Chemistry
  • Chemical Engineering(all)
  • Electrochemistry

Cite this

@article{5b9e8a360ed54d60af952cd1c945ba93,
title = "Novel heat-treated cobalt phthalocyanine/carbon-tungsten oxide nanowires (CoPc/C-W18O49) cathode catalyst for direct methanol fuel cell",
abstract = "Platinum group metal (PGM) is the common catalyst used in cathode side of Direct Methanol Fuel Cell (DMFC), however, problem arise because of the competitive reaction between methanol oxidation and oxygen reduction. Besides, using a PGM catalyst makes the DMFC expensive. Many non-platinum catalysts were developed but most of them produce hydrogen peroxide that is toxic to the cathode and membrane that reduces the performances of the fuel cell. Thus, this study proposes a novel non-platinum catalyst that produced water as main product instead of hydrogen peroxide. CoPc/C-W18O49 is prepared via pyrolysis and they demonstrate as a promising catalyst to replace PGM in acidic media. As a semiconductor metal oxide, W18O49 has interesting properties and is used as a catalyst support to enhance the reactivity of the oxygen reduction reaction. W18O49 were synthesized first through a solvo-thermal process and then mixed with CoPc/C via pyrolysis at 700 °C, and they were also synthesized in the reverse order. The catalyst was physically characterized by Field Emission Scanning Electron Microscopy (FESEM), Transmission Electron Microscopy (TEM) and X-ray Diffraction (XRD) and chemically characterized by Cyclic Voltammetry (CV) and Rotating Ring-Disc Electrode (RRDE) analysis for the oxygen reduction reaction (ORR). The results showed that the supported Nanowires (W18O49) are not transformed to WO3 after the pyrolysis process. The prepared catalyst, which is inert in the methanol environment electrolyte, has shown catalytic activity towards oxygen reduction in acidic media and has a 3.81-electron transfer, which produces water as the main product. The catalyst has comparable performance with other macrocycle catalysts with modified structures.",
keywords = "Cobalt phthalocyanine-carbon/tungsten oxide, Direct methanol fuel cell, Nanowires, Non-platinum catalyst",
author = "Karim, {N. A.} and Kamarudin, {Siti Kartom}",
year = "2017",
month = "10",
day = "15",
doi = "10.1016/j.jelechem.2017.08.050",
language = "English",
volume = "803",
pages = "19--29",
journal = "Journal of Electroanalytical Chemistry",
issn = "0368-1874",
publisher = "Elsevier Sequoia",

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TY - JOUR

T1 - Novel heat-treated cobalt phthalocyanine/carbon-tungsten oxide nanowires (CoPc/C-W18O49) cathode catalyst for direct methanol fuel cell

AU - Karim, N. A.

AU - Kamarudin, Siti Kartom

PY - 2017/10/15

Y1 - 2017/10/15

N2 - Platinum group metal (PGM) is the common catalyst used in cathode side of Direct Methanol Fuel Cell (DMFC), however, problem arise because of the competitive reaction between methanol oxidation and oxygen reduction. Besides, using a PGM catalyst makes the DMFC expensive. Many non-platinum catalysts were developed but most of them produce hydrogen peroxide that is toxic to the cathode and membrane that reduces the performances of the fuel cell. Thus, this study proposes a novel non-platinum catalyst that produced water as main product instead of hydrogen peroxide. CoPc/C-W18O49 is prepared via pyrolysis and they demonstrate as a promising catalyst to replace PGM in acidic media. As a semiconductor metal oxide, W18O49 has interesting properties and is used as a catalyst support to enhance the reactivity of the oxygen reduction reaction. W18O49 were synthesized first through a solvo-thermal process and then mixed with CoPc/C via pyrolysis at 700 °C, and they were also synthesized in the reverse order. The catalyst was physically characterized by Field Emission Scanning Electron Microscopy (FESEM), Transmission Electron Microscopy (TEM) and X-ray Diffraction (XRD) and chemically characterized by Cyclic Voltammetry (CV) and Rotating Ring-Disc Electrode (RRDE) analysis for the oxygen reduction reaction (ORR). The results showed that the supported Nanowires (W18O49) are not transformed to WO3 after the pyrolysis process. The prepared catalyst, which is inert in the methanol environment electrolyte, has shown catalytic activity towards oxygen reduction in acidic media and has a 3.81-electron transfer, which produces water as the main product. The catalyst has comparable performance with other macrocycle catalysts with modified structures.

AB - Platinum group metal (PGM) is the common catalyst used in cathode side of Direct Methanol Fuel Cell (DMFC), however, problem arise because of the competitive reaction between methanol oxidation and oxygen reduction. Besides, using a PGM catalyst makes the DMFC expensive. Many non-platinum catalysts were developed but most of them produce hydrogen peroxide that is toxic to the cathode and membrane that reduces the performances of the fuel cell. Thus, this study proposes a novel non-platinum catalyst that produced water as main product instead of hydrogen peroxide. CoPc/C-W18O49 is prepared via pyrolysis and they demonstrate as a promising catalyst to replace PGM in acidic media. As a semiconductor metal oxide, W18O49 has interesting properties and is used as a catalyst support to enhance the reactivity of the oxygen reduction reaction. W18O49 were synthesized first through a solvo-thermal process and then mixed with CoPc/C via pyrolysis at 700 °C, and they were also synthesized in the reverse order. The catalyst was physically characterized by Field Emission Scanning Electron Microscopy (FESEM), Transmission Electron Microscopy (TEM) and X-ray Diffraction (XRD) and chemically characterized by Cyclic Voltammetry (CV) and Rotating Ring-Disc Electrode (RRDE) analysis for the oxygen reduction reaction (ORR). The results showed that the supported Nanowires (W18O49) are not transformed to WO3 after the pyrolysis process. The prepared catalyst, which is inert in the methanol environment electrolyte, has shown catalytic activity towards oxygen reduction in acidic media and has a 3.81-electron transfer, which produces water as the main product. The catalyst has comparable performance with other macrocycle catalysts with modified structures.

KW - Cobalt phthalocyanine-carbon/tungsten oxide

KW - Direct methanol fuel cell

KW - Nanowires

KW - Non-platinum catalyst

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VL - 803

SP - 19

EP - 29

JO - Journal of Electroanalytical Chemistry

JF - Journal of Electroanalytical Chemistry

SN - 0368-1874

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